Williams SS Help Black Knight (Williams, 1980) - SOUNDS WORKS BUT NO SPEECH

[Rusty]

@pinballdaveh
TEST BUTTON ON SOUND BOARD PRODUCES ALL SOUND NOISES + SPEECH 12 WORDS.
SOUND BOARD HAS 2 SWITCHES SET TO ON (LEFT SIDE DOWN ON BOTH).
PINBALL MACHINE HAS BEEN RESET TO ALL FACTORY SETTINGS.

MACHINE PLAYS WELL WITH THE EXCEPTION OF SPEECH NOT WORKING.
WHEN MACHINE PLAYS NO SPEECH BUT BACKGROUND SOUND WORK DURING PLAY.
YOU CAN HEAR START OF SPEECH SMALL NOISE AT TIMES WHEN SPEECH SHOULD BE HEARD.

I ALSO CHECKED CONNECTIONS BETWEEN MPU AND SOUND BOARD TO MAKE SURE CONNECTIONS ARE GOOD.
I DID NOT CREATE NEW MOLEX CONNECTIONS TO SOUND BOARD. COULD DO THIS IF YOU THINK IT MAY FIX THE ISSUE.

1) BECAUSE SOUND BOARD TEST PROVIDES ALL SOUNDS & 12 SPEECH WORDS I CAN PROBABLY ASSUME SOUND BOARD IS OK CORRECT?
2) MPU BOARD HAS SEVERAL COMPONENTS THAT COULD BE FAULTY THAT COULD AFFECT SPEECH CORRECT?
3) IS MOST LIKELY ISSUE WITH MPU BOARD OR IS THERE SOMETHING ELSE I SHOULD CHECK?

APPRECIATE ANY HELP TO ADDRESS THIS ISSUE!

 

[pinballdaveh]

@pinballdaveh
TEST BUTTON ON SOUND BOARD PRODUCES ALL SOUND NOISES + SPEECH 12 WORDS.
SOUND BOARD HAS 2 SWITCHES SET TO ON (LEFT SIDE DOWN ON BOTH).
PINBALL MACHINE HAS BEEN RESET TO ALL FACTORY SETTINGS.

MACHINE PLAYS WELL WITH THE EXCEPTION OF SPEECH NOT WORKING.
WHEN MACHINE PLAYS NO SPEECH BUT BACKGROUND SOUND WORK DURING PLAY.
YOU CAN HEAR START OF SPEECH SMALL NOISE AT TIMES WHEN SPEECH SHOULD BE HEARD.

I ALSO CHECKED CONNECTIONS BETWEEN MPU AND SOUND BOARD TO MAKE SURE CONNECTIONS ARE GOOD.
I DID NOT CREATE NEW MOLEX CONNECTIONS TO SOUND BOARD. COULD DO THIS IF YOU THINK IT MAY FIX THE ISSUE.

1) BECAUSE SOUND BOARD TEST PROVIDES ALL SOUNDS & 12 SPEECH WORDS I CAN PROBABLY ASSUME SOUND BOARD IS OK CORRECT?
2) MPU BOARD HAS SEVERAL COMPONENTS THAT COULD BE FAULTY THAT COULD AFFECT SPEECH CORRECT?
3) IS MOST LIKELY ISSUE WITH MPU BOARD OR IS THERE SOMETHING ELSE I SHOULD CHECK?

APPRECIATE ANY HELP TO ADDRESS THIS ISSUE!

@pinballdaveh
TEST BUTTON ON SOUND BOARD PRODUCES ALL SOUND NOISES + SPEECH 12 WORDS.
SOUND BOARD HAS 2 SWITCHES SET TO ON (LEFT SIDE DOWN ON BOTH).
PINBALL MACHINE HAS BEEN RESET TO ALL FACTORY SETTINGS.

MACHINE PLAYS WELL WITH THE EXCEPTION OF SPEECH NOT WORKING.
WHEN MACHINE PLAYS NO SPEECH BUT BACKGROUND SOUND WORK DURING PLAY.
YOU CAN HEAR START OF SPEECH SMALL NOISE AT TIMES WHEN SPEECH SHOULD BE HEARD.

I ALSO CHECKED CONNECTIONS BETWEEN MPU AND SOUND BOARD TO MAKE SURE CONNECTIONS ARE GOOD.
I DID NOT CREATE NEW MOLEX CONNECTIONS TO SOUND BOARD. COULD DO THIS IF YOU THINK IT MAY FIX THE ISSUE.

1) BECAUSE SOUND BOARD TEST PROVIDES ALL SOUNDS & 12 SPEECH WORDS I CAN PROBABLY ASSUME SOUND BOARD IS OK CORRECT?
2) MPU BOARD HAS SEVERAL COMPONENTS THAT COULD BE FAULTY THAT COULD AFFECT SPEECH CORRECT?
3) IS MOST LIKELY ISSUE WITH MPU BOARD OR IS THERE SOMETHING ELSE I SHOULD CHECK?

APPRECIATE ANY HELP TO ADDRESS THIS ISSUE!

There is a sound/speech mixer pot on the speech board. I use 91% rubbing alcohol to clean these while turning pot to clean. Allow to completely dry before powering up the machine.
Sometimes re-seating the chips can solve a problem, but caution is advisable because it’s very easy to bend the chip legs and possibly break one off.

 

[Rusty]

FOLLOWED YOUR DIRECTIONS AND ISSUE IS FIXED. THE BLACK KNIGHT IS ABLE TO TALK AGAIN. USED RUBBING ALCOHOL PER YOUR INSTRUCTIONS AND ISSUE IS RESOLVED. I AM NOT WORTHY! THANKS FOR ALL YOUR HELP!